package com.lagou.dao.impl;

import com.lagou.dao.CourseDao;
import com.lagou.pojo.Course;
import com.lagou.utils.DruidUtils;
import org.apache.commons.dbutils.QueryRunner;
import org.apache.commons.dbutils.handlers.BeanHandler;
import org.apache.commons.dbutils.handlers.BeanListHandler;

import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;

/**
 * 课程模块的Dao层的实现类
 */
public class CourseDaoImpl implements CourseDao {
    @Override
    public List<Course> findCourseList() {
        try {
            //1.创建QueryRunner
            QueryRunner queryRunner = new QueryRunner(DruidUtils.getDataSource());
            //2.编写sql  判断是否删除  去除is_del = 0 的数据，未删除的数据
            String sql = "SELECT \n" +
                    "\tid,\n" +
                    "\tcourse_name,\n" +
                    "\tprice,\n" +
                    "\tsort_num,\n" +
                    "\tSTATUS\n" +
                    "FROM course WHERE is_del = ?";
            //3.执行查询
            List<Course> courseList = queryRunner.query(sql, new BeanListHandler<Course>(Course.class),0);
            return courseList;
        } catch (SQLException e) {
            e.printStackTrace();
            return null;
        }
    }

    //根据条件查询课程信息
    @Override
    public List<Course> findByCourseNameAndStatus(String courseName, String status) {
        try {
            //1.创建QueryRunner
            QueryRunner qr = new QueryRunner(DruidUtils.getDataSource());
            //2.编写sql   当前的查询为多条件不定项查询
            //2.1创建StringBuffer对象，将字符串添加进缓冲区
            StringBuffer sb = new StringBuffer("SELECT id,course_name,price,sort_num,STATUS FROM course WHERE 1=1 AND is_del = ? ");

            //2.2创建List集合保存参数
            List<Object> list = new ArrayList<>();
            list.add(0);

            //2.3   判断传入的参数是否为空
            if (courseName != null && courseName !=""){
                sb.append(" AND course_name LIKE ?");
                //like查询   需要拼接  %
                courseName = "%"+courseName+"%";
                //将条件放进list集合中
                list.add(courseName);
            }
            if (status != null && status != ""){
                sb.append(" AND STATUS = ?");
                int i =Integer.parseInt(status);
                list.add(i);
            }

            //
            List<Course> courseList = qr.query(sb.toString(), new BeanListHandler<Course>(Course.class), list.toArray());
            return courseList;
        } catch (SQLException e) {
            e.printStackTrace();
            return null;
        }
    }

    //保存课程营销信息
    @Override
    public int saveCourseSalesInfo(Course course) {
        try {
            //1.创建QueryRunner对象
            QueryRunner qr = new QueryRunner(DruidUtils.getDataSource());
            //2.编写sql
            String sql = "INSERT INTO course(\n" +
                    "course_name,\n" +
                    "brief,\n" +
                    "teacher_name,\n" +
                    "teacher_info,\n" +
                    "preview_first_field,\n" +
                    "preview_second_field,\n" +
                    "discounts,\n" +
                    "price,\n" +
                    "price_tag,\n" +
                    "share_image_title,\n" +
                    "share_title,\n" +
                    "share_description,\n" +
                    "course_description,\n" +
                    "course_img_url,\n" +
                    "STATUS,\n" +
                    "create_time,\n" +
                    "update_time\n" +
                    ")VALUES(?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?)";
            //3.准备参数
            Object[] param = {course.getCourse_name(),course.getBrief(),course.getTeacher_name(),course.getTeacher_info(),
                    course.getPreview_first_field(),course.getPreview_second_field(),course.getDiscounts(),
                    course.getPrice(),course.getPrice_tag(),course.getShare_image_title(),course.getShare_title(),
                    course.getShare_description(), course.getCourse_description(),course.getCourse_img_url(),
                    course.getStatus(),course.getCreate_time(), course.getUpdate_time()};
            //4.执行sql
            int row = qr.update(sql,param);
            return row;
        } catch (SQLException e) {
            e.printStackTrace();
            return 0;
        }
    }

    @Override
    public Course findCourseById(int id) {
        try {
            QueryRunner qr = new QueryRunner(DruidUtils.getDataSource());
            String sql = "SELECT \n" +
                    "id,\n" +
                    "course_name,\n" +
                    "brief,\n" +
                    "teacher_name,\n" +
                    "teacher_info,\n" +
                    "preview_first_field,\n" +
                    "preview_second_field,\n" +
                    "discounts,\n" +
                    "price,\n" +
                    "price_tag,\n" +
                    "course_img_url,\n" +
                    "share_image_title,\n" +
                    "share_title,\n" +
                    "share_description,\n" +
                    "course_description,\n" +
                    "STATUS\n" +
                    "FROM course WHERE id = ?";
            Course result = qr.query(sql,new BeanHandler<Course>(Course.class),id);
            return result;
        } catch (SQLException e) {
            e.printStackTrace();
            return null;
        }
    }

    /**
     * 修改课程营销信息
     * @param course
     * @return
     */
    @Override
    public int updateCourseSalesInfo(Course course) {
        try {
            QueryRunner qr = new QueryRunner();
            String sql = "UPDATE course SET \n" +
                    "id=?,\n" +
                    "course_name=?,\n" +
                    "brief=?,\n" +
                    "teacher_name=?,\n" +
                    "teacher_info=?,\n" +
                    "preview_first_field=?,\n" +
                    "preview_second_field=?,\n" +
                    "discounts=?,\n" +
                    "price=?,\n" +
                    "price_tag=?,\n" +
                    "share_image_title=?,\n" +
                    "share_title=?,\n" +
                    "share_description=?,\n" +
                    "course_description=?,\n" +
                    "course_img_url=?,\n" +
                    "update_time=?\n" +
                    "WHERE id = ?";
            Object[] param = {course.getId(),course.getCourse_name(),course.getBrief(),course.getTeacher_name(),
                              course.getTeacher_info(),course.getPreview_first_field(),course.getPreview_second_field(),
                              course.getDiscounts(),course.getPrice(),course.getPrice_tag(),course.getShare_image_title(),
                              course.getShare_title(),course.getShare_description(),course.getCourse_description(),
                              course.getCourse_img_url(),course.getUpdate_time(),course.getId()};
            int result = qr.update(sql, param);
            return result;
        } catch (SQLException e) {
            e.printStackTrace();
            return 0;
        }
    }

    //修改课程状态的方法
    @Override
    public int updateCourseStatus(Course course) {
        try {
            QueryRunner qr = new QueryRunner(DruidUtils.getDataSource());
            String sql = "UPDATE course SET \n" +
                    "STATUS = ?,\n" +
                    "update_time = ?\n" +
                    "WHERE id = ?";
            Object[] param = {course.getStatus(),course.getUpdate_time(),course.getId()};
            int row = qr.update(sql, param);
            return row;
        } catch (SQLException e) {
            e.printStackTrace();
            return 0;
        }
    }
}
